According to contemporary research, for which of the following conditions does having a specific gene guarantee an outcome?

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Huntington's disease is caused by a specific genetic mutation in the HTT gene. If an individual inherits the mutated gene, they will eventually develop Huntington's disease, making it a condition where having a specific gene guarantees the outcome. Anxiety, major depressive disorder, and attention-deficit/hyperactivity disorder (ADHD) have more complex etiologies that involve a combination of genetic, environmental, and psychological factors, and no single gene has been identified that guarantees an individual will develop these conditions.

According to Contemporary Research, for Which of the Following Conditions